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Re: [Qemu-devel] problem when building arm host
From: |
Cai Qiang |
Subject: |
Re: [Qemu-devel] problem when building arm host |
Date: |
Thu, 3 Jul 2008 14:02:39 +0800 |
I got it. I added below line
code_gen_prologue = .;
after the
.text :
{
*(.text)
/* .gnu.warning sections are handled specially by elf32.em. */
*(.gnu.warning)
*(.gnu.linkonce.t*)
} =0x47ff041f
----- Original Message -----
From: "Cai Qiang" <address@hidden>
To: <address@hidden>
Sent: Thursday, July 03, 2008 11:49 AM
Subject: [Qemu-devel] problem when building arm host
> Hi,
> I am trying to build qemu for arm host. I got below error:
>
> ......
> make -C i386-linux-user all
> make[1]: Entering directory
> `/media/system/u/SW/src/qemu-arm-host/i386-linux-user'
> arm-linux-gcc -g -Wl,-T,/u/SW/src/qemu-arm-host/arm.ld -o qemu-i386 main.o
> syscall.o strace.o mmap.o signal.o path.o thunk.o elfload.o linuxload.o
> uaccess.o vm86.o gdbstub.o libqemu.a ../libqemu_user.a -lm -lrt -lpthread
> libqemu.a(cpu-exec.o): In function `cpu_x86_exec':
> /u/SW/src/qemu-arm-host/cpu-exec.c:615: relocation truncated to fit:
> R_ARM_PC24 against symbol `code_gen_prologue' defined in COMMON section in
> libqemu.a(exec.o)
> /media/system/u/SW/usr/local/arm/gcc-4.0.2-glibc-2.3.5/arm-unknown-linux-gnu/bin/../lib/gcc/arm-unknown-linux-gnu/4.0.2/../../../../arm-unknown-linux-gnu/bin/ld:
> warning: .preinit_array section has zero size
> /media/system/u/SW/usr/local/arm/gcc-4.0.2-glibc-2.3.5/arm-unknown-linux-gnu/bin/../lib/gcc/arm-unknown-linux-gnu/4.0.2/../../../../arm-unknown-linux-gnu/bin/ld:
> warning: .init_array section has zero size
> /media/system/u/SW/usr/local/arm/gcc-4.0.2-glibc-2.3.5/arm-unknown-linux-gnu/bin/../lib/gcc/arm-unknown-linux-gnu/4.0.2/../../../../arm-unknown-linux-gnu/bin/ld:
> warning: .fini_array section has zero size
> collect2: ld returned 1 exit status
> make[1]: *** [qemu-i386] Error 1
> make[1]: Leaving directory
> `/media/system/u/SW/src/qemu-arm-host/i386-linux-user'
> make: *** [subdir-i386-linux-user] Error 2
>
> in old post of andrzej zaborowski, he said
>
> "Yes, arm-linux-user fails with the same error because gcc doesn't
> manage to make the call to code_gen_prologue. One solution is to wrap
> the #define tcg_qemu_tb_exec in tcg/tcg.h in an #ifndef, and override
> it tcg/arm/tcg-target.h with the same kind of call as was used before
> introduction of prologue/epilogue which was possibly more optimal."
>
> but I don't understand above clearly. What I did is
>
> in tcg/tcg.h
>
> #ifdef __powerpc__
> #define tcg_qemu_tb_exec(tb_ptr) \
> ((long REGPARM __attribute__ ((longcall)) (*)(void
> *))code_gen_prologue)(tb_ptr)
> #else
> #ifndef tcg_qemu_tb_exec
> #define tcg_qemu_tb_exec(tb_ptr) ((long REGPARM (*)(void
> *))code_gen_prologue)(tb_ptr)
> #endif
> #endif
>
> and add
> #ifndef tcg_qemu_tb_exec
> #define tcg_qemu_tb_exec(tb_ptr) ((long REGPARM (*)(void
> *))code_gen_prologue)(tb_ptr)
> #endif
>
> in the end of tcg/arm/tcg-target.h
>
> But seems no effect. Did I mis-understand?
>
> In old post Paul also pointed out:
>
> "Or tweak the linker script to place code_gen_prologue near to the code
> segment."
>
> Can anyone teach me how to do this?
>
> Best Regards!
>
>
>
>
>